Our brains believe whatever they see

I imagine an experiment in which viewers are presented with a pair of twins, both of whom have an unidentified substance in their mouth. Viewers are told that one of the twins has a chunk of chewing gum, whereas the other has been tricked into chewing a poisonous substance that will inevitably end up killing her. Viewers are asked to study carefully the two chewing twins, for exactly a minute, and try to determine which one is soon to be poisoned.

The experiment works better if viewers are encouraged to use the major half of their brain : either the left hemisphere, or the right hemisphere. If viewers happen to be puzzled by this advice, they can be told that their brains will solve that problem automatically.